SPIN AND VALENCE STATE EQUILIBRIA OF COBALT AND MAGNETIC-PROPERTIES OF LACOO3

	SPIN AND VALENCE STATE EQUILIBRIA OF COBALT AND MAGNETIC-PROPERTIES OF LACOO3
	LIU ST ; WU Y ; JIA YQ
刊名	journal of alloys and compounds
	1993
卷号	200 页码:171-176
ISSN号	0925-8388
中文摘要	on the basis of the spin and valence state equilibria and superexchange interaction of the various cobalt ions in lacoo3, an approximate semiempirical formula has been proposed and used to calculate magnetic susceptibilities of lacoo3 over a wide temperature range (100-1200 k). the results indicate that there are thermodynamic equilibria between the low spin state co(iii) (t2g6e(g)0) ion, the high spin state co3+ (t2g4e(g)2) ion, the co(ii) (t2g6e(g)1) ion and the co(iv) (t2g5e(g)0) ion in lacoo3. the energy difference between the low spin state co(iii) and the high spin state co3+ is about 0.006 ev. the content of the low spin state co(iii) ion is predominant in lacoo3 and the content of the high spin state co3+ ion varies with temperature, reaching a maximum at about 350 k, then decreasing gradually with increasing temperature. at low temperature the contents of the co(ii) ion and the co(iv) ion in lacoo3 are negligible, while above 200 k the contents of both the co(ii) ion and the co(iv) ion increase with increasing temperature; however, the content of the co(ii) ion always is larger than that of the co(iv) ion at any temperature. these calculated results are in good agreement with experimental results of the mossbauer effect, magnetic susceptibility and electrical conductivity of lacoo3.
收录类别	SCI收录期刊论文
语种	英语
公开日期	2011-01-19 ; 2011-06-10
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/36039]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	LIU ST,WU Y,JIA YQ. SPIN AND VALENCE STATE EQUILIBRIA OF COBALT AND MAGNETIC-PROPERTIES OF LACOO3[J]. journal of alloys and compounds,1993,200:171-176.
APA	LIU ST,WU Y,&JIA YQ.(1993).SPIN AND VALENCE STATE EQUILIBRIA OF COBALT AND MAGNETIC-PROPERTIES OF LACOO3.journal of alloys and compounds,200,171-176.
MLA	LIU ST,et al."SPIN AND VALENCE STATE EQUILIBRIA OF COBALT AND MAGNETIC-PROPERTIES OF LACOO3".journal of alloys and compounds 200(1993):171-176.